Gas-absorption apparatus



March 1, 1927. v

v Z9 M? 0 13,619,430 M. MAURAN GAS ABSORPTION APPARATUS Filed Sept. 18. 1925 2'Sheecs-Sheet 1 I INVEIQTOR I M}! BY M/YM mvm ATTQRNEYS ings illustratingan apparatus em UNITED" s'rnrss MAX HAURAK, OF moans FALLS, NEW 55013211,. J13 ALKATLI 'QTORK$, mo, 0.? NEW YORK, 3Z1.

oAlis-snsons'rron essentials.

Application fiscal fic'ptcmser This invention relates to en a paratus tor the absorption of gases liqni' s and more particularly to an improved apparatus for the absorption of chlorine in milk-oflime for the preparation of solutions of calcium hypochlorite for use in bleaching and for ther purposes.

The invention provides an improved a paratus whereby the chlorine may be rapi ly absorbed in the absorbing liquor, and whereby large usntities of the absorbing liquor are brought rapidly into contact with the gas and kept in rapid circulation so that objectionable decomposition will not take place.

In the improved apparatus of the present invention the airlift principle is made use of to bring large quantities of the absorbing liquor into intimate contact With the gas and to promote rapid circulation and agitation, with resulting rapid absorption of the gas. The apparatus described and claimed herein is particnlarly'adapted for the practice of the process described and claimed in my gope'nding application filed January 8 1923;Serial No. 611.229,.

The invention will be further described in connection with the accompanying drawoodying the invention. In the accompanying drewin s,

Jig. 1 is a vertical sectional View" oi": the ap aratus;

ig. 2 is an enlarged fragmentary View. showing the base of the air-lift column of Fig. 1; and Fig. 3 is a sectional View of the line 3-3 of Fig. 2. In the embodiment of the invention illustrated, the apparatus consists of a tank oi vet 1 which is made of concrete or other suitable material. resistant to the action of the solutions being handled. This tank is provided with a valve controlled rlraW-ofi 2 and is adapted to be filled with the absorbing liquor indicated at;.3. I r

In the manufacture of oelciumhypochlo ritesolutions for use in bleaching and for other purposes this absorbing liquor may be a' solutions-11d suspension of lime in Water, commonly know as milk-of-lime, and having such a lime content that when the proper amount of chlorine has been absorbed there in there will be very little free liroe'left in solution and suspension.

v to.

Li uid chlorine or compressed. chlorine thorn any suitable source is supplied s through the through the pipe ans. e expansion valve to tr and thence through the no of an'airlift column 12 ierinei ter referred The chlorine'snpply may a ly be provided in the term of cynndes or drums oi liquid chlorine containing shout onetor liquid. chlorine. Such c. chlorine container is indented convent: 1 es the source sup ily.

At the bottom filly i1 costing 9 illustreted more cleerly'in .93 end ll. The downw rtll W nialy 1 1g.

otter The nos ries its upper bell check 1' is restrained from too greet motion iioni it" i seat by the sons. l t. lhehall t acts cs a check valve prevents liquor from.

when the gas flow is shut off or errnpted. It will be noted. that the column 1S relatively long 1- on to it di so that it prov l Loi" onward for the notion the chic quote. The column 152 somewhat above the no no liquid in an'enleigetl cs... spaced at from the tube 12 by members if) and providing an annular l? the casing end. the tube. he cssing' is covered its upper end as inc l 18. the cover being {provided with an eyebolt and. e valve connection 26, and. discherses downwardly into thetanlr below the liq-old level therein. The eye} rniits the ready tire column valve :20 oi .l. IfuWll more the casing; when the tan is initially tilled with the millc oi-lirne solo m in the operation oi? liquid chlorine is sow chlorine container and poss pipe 4% to the tyres-sorc reralve {Mi to ti sure, the .s lo.

the. cose oi liquid lib F ii

eflected.

orponsion cud 'vo porirotiom assists in cooling the absorbing liquor. this cooling being effected by the expansion coil 6 immersed in the liquor. This cooling;- octiou 's important in neutralizing and controlling; the heat produced by the rapid absorption of the chlorine gas which takes piece in the prom tice of the invention. U

After the chlorine hes expended :irid has served to cool the liquor then dicchorged through the nozzle ll into the ,bottom of the air-lift column The chlorine gas thus escaping into the bottom of the column tends to rise therein and reduces the density or the column as 21 whole so that ii rapid flow upwardly through the column 13 takes pluce, on the air-lift principle, the heavier liquor in the t-eulr chorus the passage displacing the liquor chlorine mixture of reduced density there-iii. l uririg this-rapid upwerd flow through the relatively small tube 1% the chlorine is brought into inticorrtoctwith the millooii-lime and rapid absorption is promoted, while the rapid flow 0. cl agitation incident to this ttllT-llflill action keeps the millr-oi-liihe well agitated cud reduces (longer of over-chlorlriatiou.

The chlorine goo will be to e considerable extent absorbed in the relatively long upword passage through the column 12. Any unabsorbed chlorine gee will be discharged together with the liquor solution into the annular space within. the casing l? "Where the absorption of the chlorine is coruolcted. Diving to the rapid flow upwardly 'tlumigh the column 1:2 the liquor and unabsorbed gas are discharged with consideroblc ugitw tion and s;lushiug into the annular coir tairier thus further promoting the completion of the absorption or"? the chlorine. The relatively enlarged unuulcr space within the cosinglli reduces the velocity of flow of the solutioueud providl 'iortho completiou or the o. WllllO it also serves to confine any rumbsorhed chlorine which remains in the upper portion of the cosicg in scous lorui until ubsorbcd.

lo olderetiou accordingly, the. chlorine is introduced into a. moving" body of the solution, causing the solution and to pass upwardly with rapid circulation end. ug'tction and. with resulting rcpid absorption of the gas in. the liquor Fresh amounts or": the solution are continually drown iuut the the column and admixed with "further amounts of chlorine gas. The solution escaping lroiu the tube" or the air-lift conduit pipe 1% overflows into the surroundingspace and aguiri enters the main body oit solution. In this way the entire body of millr-of-lime is kept in agitation and the chlorination is progressively and rapidly The reaction is e'o licuble to the ubsorptiou cit color-roe other solutions such ero rec as those used in melting alkaline hypochlorites; us "well as for the absorption of other gases particularly liquefied gases, in absorp tion medic therefor. It will be noted that the agitation oi the solution and the obsorption of the gas therein are brouo'ht about without niechunicol agitation without the application of external power for that purpose The pressure of the gas itself, in the case of a compressed or liquefied gas, uch as chlorine, is utilized for forcing the us to the bottom of the air-lift column, and the; air-lift eiicct together with the ineotor ell'ect resulting from the discharge of the gosinto the liquid are utilized to bring about the rapid circulation upwardly through the tube 12 and the agitation of the body of solution, as a Whole, resulting thercfrom. The expansion coil submerged in the liquid may be omitted and the chlorine gas passed directly to the bottom of the airliit column, but the employment of an expansion coil in the munner'described and illustrated has the important advantage of providing for the cooling of the solution and the neutralizing of the heat of reaction without lzhe necessity of using extraneous cooling" moons, and also without requiring the provision of extraneous means for heatingthe chlorine to promote its Va orization. The utilization of the cooling e ect of the expanding and vaporizing chlorine in this way enables rapid circulation and absorp tion to take place without excessive overheating of the .solution by the heatof reaction. I cluimz-- 1. Gus absorption apparatus comprising u tunic adapted to contain liquid, 2. vertically arranged tubular passage in said tank, the lower end of said passage beingin open communication with said tank, a. casing covering the upper end of said passage, said casing opening downwardly below the normal liquid level in 'the tank, endmeims to introduce gas into the lower portion of said passage below the point at which said casing opens into said tank.

2. ias ubsorption apparatus comprising a, tank adopted to contain liquid, at verticully arranged tubular passage in said bank, the lower end of said passuge being in open communication with said tank, a casing covering the upper end or said passage, said casing olaening downwardly below the normal liquid level in the took, means to introduce gas into the lower portion of said passage "at a point below the opening of said casing", and a. valved outlet connected to the 125 communication with said tank, a tubular oasing at the upper end of said tube annu'larly spaced therefrom and extending below the normal liquid level in the tank, a cover at the upper end of said casing spaced from the upper end of said tube, and a nozzle within the lower portion of said tube to provide for the introduction of gas therein.

4. Gas absorption apparatus comprising a tank adapted to contain a 1iquid,'a vertically arranged tubular passage in said tank, the lower end of said passage beingin open communication With said tanlz, a casing covering the upper end. of saidpassage, said casing opening downwardly below the normal liquid level in the tank, a container for a gas under pressure, an expansion or "vaporization receptacle Within the tank and means to introduce a gas from said receptacle into the lower portion ofsaid tubular passage.

In testimony whereof I. afiii: my'signatnre.

MAX MAURAN. 

